Process of waterproofing paper and the like



Patented Get 15, 1929 urine r. names, or NEWYORK, N.

Y., ASSIGNOR or ONE-HALF T0 ALBERT MEEHAN, OF NEW YORK, N. Y.

PRUEESS or WATERPROOFING PAPER AND THE LIKE No Drawing.

Application filed April 16,

of moisture or Water proofing and more espem vide a process of ciallyrelates to a process of making paper moisture or Waterproof and oneobject of the invention is to provide a process of making paper moistureor water proof and also pliable and bendable without cracking orbreaking when tolded or rolled.

Another object of the invention is to promaking moisture or water proofpaper adapted to be used for lining the interiors of cartons orcontainers and thereby rendering them moisture or water proof.

ll attain these objects and such other objects as are kindred thereto bythe process which consists in first saturating with a substantiallynon-drying, non-oxidizing liquid such as petroleum the material or paperto be 2') waterprooied and pressing the excess of this liquid orpetroleum out of the material or paper, passing one or more times as maybe desirable the material or paper having a remainder of thesubstantially non-drying 25 non-oxidizing liquid or petroleum therein toof first saturating the material or paper with Y water proofing mixtureremaining therein,

above mixture the requisite number of times through a waterproofingmixture such as the mixture of gumlac, and by gur'nlac is meant shellac,alcohol and water and then drying the material or paper, the purposesaid liquid or petroleum and then pressing the excess of this liquid orpetroleum out of the material or paper being to prevent the material orpaper when assed through the rom absorbing the an extent as to renderthe brittle when dried.

mixture to such material or paper l have lound as a suitable waterproofing mixture fifty l (50) grams of gumlac, nine hundred and fifty(950) grams of alcohol and two 2) to eight (8) percent of distilledwater. "l e paper first having been saturated with liquid peroleum andtheexcess thereof pressed therefrom, and having. the petroleum beingpassed through the and dried becomes proof against moisture or water andis not brittle but bendable and toldable ltor wrappingand the purposesfor which water prootpaper is generally used,

1926. Serial no. 102,554.

and is also well adapted for lining the interiors 0t containers and thelike for rendering them Water proof.

I have also found that my process can be performed by first saturatingthe paper with it petroleum and pressing the excess of petroleum out ofthe paper and then passing one or more times the paper havin thepetroleum remaining therein throng a mixture of gumlac, glycerine,alcohol and distilled t water and drying the pa er, suitable proportionsfor this mixture eing 100 grams of gumlac, 50 grams of glycerine, 800grams of alcohol, and 50 grams of distilled water.

The term gumlac, as used in the specifi- 6a cation and claims,"signifies the ordinary shellac of commerce What I. claim and tersPatent is:

1. The process of Water proofing paper which consists in saturating thepaper with desire to protect by Let- 'liquid petroleum, pressing theexcess of liquid petroleum out of the paper, passing one or more timesthe paper having the petroleum remainder therein through a mixture ofone hundred grams of gumlac, eight hundred grams of alcohol, fifty gramsof glycerine, and fifty percent of distilled water, and drying thepaper.

2. The process of waterproofing paper which consists in saturating thepaper with liquid petroleum, pressing the 'excess of liquid petroleumout of the paper, passing one or more times the paper having the petroleum therein through mixture of gumlac, 851 glycerine, alcohol, anddistilled water.

3. The process of waterproofing paper which consists in saturating thepaper with petroleum, pressing. the excess of petroleum out of thepaper, passing the paper having the petroleum remainder therein througha mixture of gumlac, alcohol and water, and drying the paper.

4, A process of waterproofing 'material which consists in saturating thematerial with petroleum, removing the excess, and finally passing thematerial having petroleum therein through a gumlac waterproofingsolution,'said petroleumpreventing ex cessive absorption by the materialof, the gumlac solution. 5. A process of waterproofing material whichconsists in saturating the material 5 with a liquid hydrocarbon,removing, the excess liquid from the material, then passing the materialthrough a mixture containing gumlac, the liquid hydrocarbon in saidmaterial preventing excessive absorption by the 10 material of saidgumlac mixture, and finally dryin the material. 7

6. E waterproofed paper provided with a coating of gumlac and glycerineand impregnated' with petroleum.

- 15 Signed at New York, in the county of New York and State ofNew York,this 15th day of April,A. D. 1926.

, ABELARDO F. CAMPA. 1

